| Abbreviation | Definition |
|---|---|
| GNAT | Great Nick Andrews Trike |
| GNP | Gross National Potholes |
| GNP | Gross National Product |
| GNSS | Global Navigation Satellite System |
| GOAL | Get Out And Look |
| GOFI | Grains and Oilseeds Freight Index |
| GOLD | Generic Obstacle And Lane Detection |
| GOR | Gas Oil Ratio |
| GOR | Grille Open Reinforcement |
| GOV | Government - Owned Vehicle |
| GP | Grouned Plane |
| GPGS | Government Purchases of Goods and Services |
| GPIRB | Global Position Indicating Radio Beacon |
| GPIRS | Gas Production Inquiry and Report System |
| GPIRS | Global Positioning/Inertial Reference System |
| GPMR | Gallons Per Mile Ratio |
| GPS | General Pavement Studies |
| GPS | Going Perfectly Straight |
| GPTC | Gary Public Transportation Corporation |
| GPTM | Great Plains Transportation Museum |